The Radiative Heat Losses node is available when the Compute particle temperature check box is selected in the physics interface Additional Variables section. Use the Radiative Heat Losses node to model the heating or cooling of a particle due to radiative heat exchange with its surroundings according to the Stefan-Boltzmann law for diffuse gray surfaces.

Enter a Particle emissivity εp (dimensionless). The default is 1. Enter a value or expression for the Temperature, T (SI unit: K), or if the temperature is computed by another physics it can be selected from the list. The default is 293.15 K.